When the two were out of the mayor’s presence and on their way to the factories, Bob remarked:
“Fitz, how did the mayor learn that I want to go through your machine-shops and places?”
“He heard us talking.”
“Heard us talking?”
“Yes. There’s a wireless telephone instrument in the room where we were, an automatic one that catches every sound.”
“Oh!”
“Yes.”
“And what did the mayor mean by saying he’d hold you responsible for any trouble that might arise?”
“Oh, nothing—nothing!” Fitz Mee answered hastily and grumpily.